The Powder Toy

The Powder Toy is a desktop version of the classic 'falling sand' physics sandbox game, it simulates air pressure and velocity as well as heat!
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Download Powder Toy
Version 78.1 for
Powder Toy Beta
Version 79.1 for
Wrong operating system? other platforms here.
If you've got any bugs or suggestions, post them here
Changes for this version (Show More)
  • Version 79.1 beta
    • Prevent changing of Window size if the screen is too small.
    • Fix bug that caused pressure to leak from TTAN when pausing/framestepping
    • Fix crash when opening display options
  • Version 79.0 beta
    • Fix a problem with GPMP that caused gravity to depend on air pressure.
    • Fix TNT sometimes not exploding if multiple TNT particles are in the same place.
    • Fix PUMP not generating negative pressure if it is next to a wall.
    • Better colour options preview.
    • New element titanium (in the solids menu), which completely blocks air and absorbs some neutrons
  • Version 78.1
    • Fix bug that created "weaponised explosive GEL"
    • Changes to License (GPLv2 to GPLv3)
    • Fix bug that caused thumbnail caching to not work
    • Remove unused debug output of thumbnail cache
    • New save format: OPS, allows saving of almost all data within the simulation
    • Plasma can now travel through portals and PIPE
    • Changes to GEL, will no longer absorb water when saturated
    • Fix bugs when moving signs
    • Fix file opening on Mac OS X
    • Line snapping in the decoration editor
    • Changes to SING to prevent it from exploding through walls
    • Code cleanup for mouse scaling
  • Version 75.0 beta
    • New element: GEL
  • Version 74.2
    • Fix bug where Ice won't melt
    • Improve appearance of BCOL
    • Allow Walls to be used to protect PIPE
  • Version 74.1
    • Icon for Force Elements
    • Allow DEST to be used with clone elements
  • Version 74.0
    • Fixes for Triangle brush and minor electron bug
    • Debug lines for WiFi, Portal and Soap
    • Fusion for H2 at high temperature+high pressure
    • Ambient heat and Newtonian Gravity in Quick Options menu.
    • Smudge tool
    • Speed improvements for particle drawing
    • FRAY (Move other particles) and Force elements section
  • Version 73.1
    • Enable use of caching server to improve performance or thumbnail retrieval.
    • Fix issue where sign tool creates invalid walls
    • Fix issue where LRBD/RBDM isn't ignited by WATR
    • Fix crash on rotating a stamp with walls as wide as the window
    • Fix Invisible photons
    • Fix bug where WARP+SING destroys DMND
    • Fix issue where Lua can't create photons in glass
  • Version 65.4
    • "Sand" effect for drawing powders, activate with "N"
    • Elements from Maksprog's mod
      • LIGH - Lightning
      • DEST - Variation of BOMB
      • TESC - Tesla coil, creates lightning
      • EMP - Destroys electronic components
    • Fix bug with infinite temperature
    • Fix beta enrolling
    • Add a new mode to filter, subtract (tmp of 3)
  • Version 64.3
    • Decoration editor tool menu, with lighten and darken tools.
    • Can type in decoration editor color boxes for specific RGB values, hit enter after typing a number to confirm
    • SOAP removes decoration, opposite of BIZR.
    • Water equalization, turn on in options menu, or tpt.watertest() .
    • BUBW changes to be more realistic, can explode.
    • New element CAUS, an acid like gas, created from ACID+WTRV.
    • Can see selected elements from Lua, tpt.selectedl or tpt.selectedr .
    • Saved settings are in JSON format, replaces powder.def
    • Can opt in to receive beta updates.
    • QRTZ scatters photons.
    • New Tool, PROP, edit properties easily without console.
    • FILT has modes with .tmp (0,1,2). 0 is convert (old method). 1 will filter (only close color can pass). 2 is add color.
    • 'Sign out' button in the login menu, instead of submitting blank data.
  • Version 60.1
    • Tools menu which holds AIR, HEAT, COOL, ect.
    • tpt.getscript() to download scripts from the official script repository.
    • tpt.setwindowsize(scale, fullscreen) to change the scale (1 or 2) and fullscreen (0 or 1).
    • Selection for stamp/copy is now by pixel.
    • Water puts out fire better.
    • New Elements CO2, BUBW, DRIC, STOR, PVOD, CONV.
    • Zoom toggle alt-z.
    • BIZR acts as a dye.
    • Many other various fixes and improvements.
  • Version 61.0
    • Added energy only wall (Photons, Neutrons, etc) as replacement for Gas only wall fix
    • STOR will change appearance when it holds a particle.
  • Version 55.5 beta
    • Speed improvements
    • Fix crash on Windows
  • Version 52.0
    • New Element: DLAY
    • Lua API additions
    • Miscellaneous bug fixes.
  • Version 53.0 beta
    • New Element: WIRE
    • Experimental Gravity simulation
  • Version 51.0
    • New Elements: GPMP, PBCN, CLST
    • Improvements to "favouring"
    • Better liquid behaviour in radial gravity mode.
    • Other miscellaneous bug fixes.
  • Version 50.5
    • Lua scripting
    • Local saving (Hold CTRL when using open/save buttons)
    • Higher quality thumbnails and previews
    • In game conversation notifications
    • Simulation options dialog
    • Realistic gravity (optional)
    • Ambient heat (air heat)
    • Improvements to favourites browsing
    • Speed improvements
  • Version 49.1 beta
    • Lua console
  • Version 49.0 beta
    • Speed improvements for liquids and other elements
    • Higher quality thumbnails and previews
    • In game conversation notifications
    • Simulation options dialog
    • Realistic gravity (optional)
  • Version 47.4
    • Fix crash when using rotate tool on Windows
    • Photons and neutrons may pass through portals
  • Version 47.0
    • Enhanced visual effects for Portals
    • Glow now has more stimuli (Green: Pressure, Blue: Movement, Red: Heat)
    • Python console (Unavailable in current beta)
    • Fixed issue where you appear to be logged in but aren't.
    • Changes to Quartz (Grows like crystal when exposed to salt water)
    • Singularity explodes upon death
    • Save ID shown after saving and on Open Dialog
    • Rearrangement of some elements (Photons in Radioactive, Thunder in Explosive, etc)
  • Version 46.3
    • Major game engine and performance improvements.
    • New GOL elements.
    • More secure login system
  • Version 45.2
    • Important! Fix for Auto-update in Linux.
  • Version 45.1
    • Small bugfix for Lava and Portals.
    • Fix crash when 2 of the same stickman are somehow placed.
  • Version 45.0
    • Fix bug where description would persist after a reset
    • ARAY now passes through INWR without interracting.
    • INST has been fixed and placed in the Electronics menu
    • Photons turn into neutrons when passing through INVS
    • Other small bug fixes.
  • Version 44.7
    • Fix login and dialoq text box issues.
    • Small bugfixes to some elements.
    • Additional 'debug' information.
    • Increase WIFI channels
    • Add missing icons for menus and display modes.
  • Version 44.6
    • Fix for brush issues when using small brushes.
    • Pause state saving modifications.
  • Version 44.5
    • Fix corruption issues with FAN wall.
  • Version 44.4
    • Many new elements from cracker64s mod.
    • Pause state is saved.
    • Particle properties are saved more accurately.
    • Improved search and save viewing, added descriptions and comments.
  • Version 42.3
    • Changed internal temperature scale to kelvin.
    • Fixed physics bug with certain powders.
    • Fixed bug when loading saves with stickman in.
    • Added save history, the ability to view previous versions of saves.
  • Version 42.0
    • New Elements: Brick, Glow, Diesel, many others.
    • Source code seperation
    • Lots of other stuff that I can't remember.
  • Version 41.3
    • Fixes bug where Insulation would burst into flames randomly
    • Moves fancy new effects into a separate colour mode.
  • Version 39.0
    • New element: Liquid Crystal
    • New element: Battery
    • New element: Noble Gas
    • Copy, cut and paste
  • Version 38.0
    • New element: Nitrogen Ice
    • New element: Electrode (Allows currents to jump)
    • Adds a lock icon to private saves.
    • Binds the '[' and ']' keys to decrease/increase the cursor size for those without scroll wheels.
    • Fixes wall menu issue where walls would be selected by accident.
  • Version 37.0
    • New element: Plasma
    • New element: Thunder/Lighting
    • New wall: Allows only gas
    • Fixes HUD bug.
  • Version 36.3
  • Version 36.2
    • Fixes bug where rating would appear as Zero in search.
  • Version 36.1
    • Feature: Particle sampling with middle click
    • Feature: Download from website, for information, see the "Announcement" forum section.
  • Version 36.0
    • Changes to the menu
    • New elements for electronics
    • New voting system
    • Added functions for moderating
  • Version 35.0
    • Added elements: White Hole, Black Hole, Rubidium and Liquid Rubidium
    • Fixed the OSX version
    • Some other bug fixes that I forgot.
  • Version 34.0
    • Fixed certain graphical glitches
    • Changed menu categories
    • Increased menu hover size
  • Version 33.2
    • Photons can now ignite flammable materials.
    • Distilled water will turn into water on contact with water.
    • Fixes burning broken metal
  • Version 34.0 (Beta 6)
    • New element menu layout
    • New element: Liquid Nitrogen
  • Version 34.0 (Beta 5)
    • Improvements to stamp browser
    • Added Glyphs for Blob and Heat view
    • Fixed bug that caused a crash on Windows systems when using the wall tool in the window edges.(Fixed more than last time)
    • Decreased/Increased Min/Max Temperatures.
  • Version 34.0 (Beta 4)
    • Cool, heat and Air no longer crash upon flood fill
    • Fixed bug that caused a crash on Windows systems when using the wall tool in the window edges.
    • Stamp browser now allows multiple pages.
    • Improved the zoom features, allowing inspection.
    • Modification to temperature simulation, pressure is now taken into account with transitions from liquid to gas and vice-versa
    • Fixed bug where Salt-water would not leave salt upon evaporation
  • Version 34.0 (Beta 3)
    • Bug fixes for uranium
    • Fixed bug where extremely hot objects would show as black
    • Fixed but where stamps would not be loaded
  • Version 34.0 (Beta 2)
    • Bug fixes
    • Legacy Mode state is now saved and loaded
    • Fix "Cool" and "Heat" when drawing on walls.
    • Air now works.
  • Version 34.0 (Beta 1)
    • Bug fixes
    • Legacy Mode (Older saves will load with legacy mode, preserving the functionality of the older powder toy)
    • Heat and Cool elements. (Air is broken until next beta.)
  • Version 34.0 (Beta)
    • Heat Simulation (With free bugs and glitches)
    • New Element: Uranium, heats up when pressurised.
    • New button, AIR, provides instant air, the Alt+Click and Middle Click can be used as a shortcut
  • Version 33.1
    • Masses of bug fixes
    • Broken metal and breakable metal fixed (conduction)
    • Liquid collisions fixed.
  • Version 33.0
    • Added Photons, particles similar to neutrons that travel in straight lines
    • Added destructable metal
    • Fixed a glitch with diamond that would make it appear invisible to air pressure.
  • Version 32.0
    • Added Diamond (Thanks to ief014)
    • Fixed packaging errors for the Windows release
  • Version 31.0
    • Plutonium more powerful
    • Changes to the handling of lava (Now solidifies into the same material it was melted from).
    • New element: Salt.
    • New element: Salt water
  • Version 30.0
    • Added the ability to change the zoom strength
    • Increased the maximum pen size.
    • New element: Concrete, tougher than stone, stackable.
    • New element: Distilled water, similar to water, but doesn't conduct electricity
    • Changed menu layout, walls at the bottom, elements at the top (to allow for more future elements)
    • 32bit colour for Macintosh versions.
  • Version 28.4
    • Fixes crash when loading a save with acid.
    • Another tiny change for acid colour in blob mode
  • Version 28.3
    • Fixes acid colour in blob mode
    • Fixes blob mode colour on Macintosh and 16bit colour systems
  • Version 28.2
    • Quit confirmation dialogue when using the escape key
    • Walls are "blobbed" in Blob view
  • Version 28.1
    • Steam rises
    • Acid drastically changed, now dilutes itself when dissolving other particles
  • Version 28.0
    • "Yellow wall" bug fix, doesn't absorb particles when placed above another wall type.
    • New wall type added: E-Hole, absorbs particles when unpowered, released them when powered.
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